mentat/query-pull/src/errors.rs

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// Copyright 2018 Mozilla
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License. You may obtain a copy of the
// License at http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
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use std; // To refer to std::result::Result.
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use mentat_db::{
DbError,
};
use core_traits::{
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Entid,
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};
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pub type Result<T> = std::result::Result<T, PullError>;
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#[derive(Debug, Fail)]
pub enum PullError {
#[fail(display = "attribute {:?} has no name", _0)]
UnnamedAttribute(Entid),
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#[fail(display = ":db/id repeated")]
RepeatedDbId,
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#[fail(display = "{}", _0)]
DbError(#[cause] DbError),
}
impl From<DbError> for PullError {
fn from(error: DbError) -> PullError {
PullError::DbError(error)
}
}